147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/* $NetBSD: cpu.c,v 1.6 2005/12/11 12:17:04 christos Exp $ */
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/*
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* This file contains information proprietary to Be Inc.
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*/
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/*-
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* Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gary Thomas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <lib/libsa/stand.h>
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#include "boot.h"
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/*
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* Return the ordinal of the CPU on which the code runs (0/1)
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*/
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#define CPU1_HRESET 0x20000000
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int
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whichCPU(void)
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{
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volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF3F0;
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if (*CPU_control & 0x02000000) {
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return 1;
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} else {
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return 0;
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}
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}
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/*
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* Force CPU #1 into Hard RESET state
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*/
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void
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resetCPU1(void)
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{
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volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
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*CPU_control = CPU1_HRESET;
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}
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/*
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* Return state of CPU RESET register
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*/
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unsigned long
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cpuState(void)
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{
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volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
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return *CPU_control;
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}
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/*
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* Start CPU #1
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*/
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void
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runCPU1(void *entry)
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{
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volatile unsigned long *CPU_control = (unsigned long *)0x7FFFF4F0;
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long *PEF_vector = (long *)0x3000;
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long *PEF_vector2 = (long *)0x3018;
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PEF_vector[0] = 0;
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PEF_vector[1] = 0;
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PEF_vector[2] = 0;
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PEF_vector[3] = 0;
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PEF_vector[0] = 0;
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PEF_vector2[0] = 0;
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*CPU_control = 0x80000000 | CPU1_HRESET;
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/* Give the other CPU a chance to find the zero value */
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delay(1000);
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PEF_vector[0] = (long)entry;
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PEF_vector[1] = (long)entry;
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PEF_vector[2] = (long)entry;
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PEF_vector[3] = (long)entry;
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PEF_vector[0] = (long)entry;
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PEF_vector2[0] = (long)entry;
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}
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/*
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* CPU #1 runs here
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*/
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volatile int cpu_ctr = 0;
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void
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cpu1(void)
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{
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while (1)
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cpu_ctr++;
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}
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volatile int CPU1_alive = 0;
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void
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start_CPU1(void)
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{
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volatile long *key = (volatile long *)0x0080;
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CPU1_alive++;
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*key = 0;
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/* Wait for a kernel to load up a vector of where we should jump */
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while (*key == 0)
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delay(10);
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run(NULL, NULL, NULL, NULL, (void *)*key);
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}
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void
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wait_for(volatile int *ptr)
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{
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int i;
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for (i = 0; i < 10; i++) {
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if (*ptr)
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return;
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delay(10);
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}
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printf("CPU #1 didn't start!\n");
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}
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